All your buoyancy comes from non rigid devices (vest, suit). As you go deeper those devices compress and you lose buoyancy causing a feedback loop. Compounded w

All your buoyancy comes from non rigid devices (vest, suit). As you go deeper those devices compress and you lose buoyancy causing a feedback loop. Compounded with loss of vertical references, you can quickly sink to the depth where the air you breathe will become toxic. At that point you don’t have the mental capacity to save yourself.